Trolley.



(Applietion med June 21, 1901.)

:um model.)

1H: ohmsl PETERS co. Poroumo.. wAsHmsToN, n. c,

UNITED STATES PATENT OFFICE.'

MATH STOLL AND JOHN W. RUOK, OF PITTSBURG, PENNSYLVANIA.

TROLLEY.

SPECIFICATION forming part of Letters Patent N o. 695,506, dated March 18, 1902.

.Application filed J' une 2l, 1901.

To @ZZ whom it may concern:

Be itknown that we, MATH STOLL and JOHN W. RUCK, citizens of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Trolleys; and we do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to certain new and useful improyements in trolleys, and relates more particularly to that class that will not come off the wire or become accidentally disengaged therefrom. i

The invention has for its object the provision ofnovel means whereby the attachment y may be easily secured Vto any trolley now use and will retain the wire in proper posi"- tion, but will allow` the trolley to be moved from the wire. when the occasion requ'ires but not accidentally disengaged.` l"- r l The invention also aims to construct an attachment that will be.'V xtremely simple,

strong, durable, and comparatively inexpensive to manufacture;afurthermore, one that will be highly efficient in its operation.

In describingthennvention in detail reference is had to the acompanying drawings, formin ga part of this specification, and wherein like numerals of reference indicate corresppnding parts throughout the views, in which- Figure l is a side elevation of the upper portion of a trolley pole and harp, showing the trolley-wheel and our improved attachment applied in position. Fig. 2 is a front elevation thereof.

In the drawings the reference-numerali indicates the upper portion of the trolley-pole carrying a trolley-harp, in which is mounted a trolley-wheel 3, these parts being of the ordinary and well-known construction. Below the trolley-harp 2, upon the trolley-pole 1, is suitably secured a block 4, upon which are mounted semicircular spring-.arms 5, these arms carrying cross-pieces 6, the upper end of the spring-arms and the inner extension of the cross-pieces 6 forming bearings 7, in which are rotatably mounted spherical antifrictionwheels 8, which are normally in close proximity to one another, the lower face of the wheels engaging the upper face of the trolley at certain times.

The operation of our improved trolley is as follows: The trolley-wire passing over the trolley-wheel in the usual manner will be prevented from disengagement therefrom by means of the semicircular spring-arms, in

connection with the spherical antifrictionrollers 8, as shown. When it is desired to disengage the trolley, the same is pulled downwardly by means of the usual cord attached to the trolley-pole. The trolley-Wire will then be passed between the spherical rollers 8, and

the spring-arms will be expanded sufficiently tdisengage the trolley-harp from the Wire. The`trolley-wheel may then be again applied fin position by allowing the wire to pass downwardly between the spherical antifrictionrollers, thereby expanding the semicircular spring-arms, allowing thewire to engage in the groove of the trolley-wheel.

The many advantages obtained by this kconstruction will be readily apparent from the foregoing description, 4taken vin connection with the accompanying drawings, and it will be noted that various changes may be made in the details of construction without depart ing from the'spirit of our invention.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, :is-

In combination with a trolley-pole, a harp and trolley-Wheel, a block attached to said pole, semicircular spring-arms, cross-pieces mounted in said arms, bearings arranged in said semicircular spring arms and crosspieces, and spherical antifriction rollers mounted in said bearings, all parts being arranged and operating substantially as described and for the purpose set forth.

In testimony whereof we have hereunto affixed our signatures in the presence of two subscribing witnesses.

A MATH STOLL.

JOHN W. RUOK.

Witnesses:

LOUIS MOESER, M. HUNTER. 

